3 years ago

Which expression is equivalent to (4h7k2)4?

1 answer:

7 0

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4) 1% of what number is 10?

g100num [7]

Answer:

1000

Step-by-step explanation:

100 times 10 = 1000

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3 years ago

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What is the solution of -8/2y-8=5/y+4-7y+8/y2-16

omeli [17]

The answer would be -0.102564 repeating because if you do the math before dividing you would get -8/6.5/-1.5/-8

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3 years ago

Situation:A researcher in North America discoversa fossile that contains 65% of its originalamount of C-14..-ktN=NoeNo inital am

zheka24 [161]

SOLUTION

We have been given the equation of the decay as

$\begin{gathered} N=N_0e^{-kt} \\ where\text{ } \\ N_0=initial\text{ amount of C-14 at time t} \\ N=amount\text{ of C-14 at time t = 65\% of N}_0=0.65N_0 \\ k=0.0001 \\ t=time\text{ in years = ?} \end{gathered}$

So we are looking for the time

Plugging the values into the equation, we have

$\begin{gathered} N=N_0e^{-kt} \\ 0.65N_0=N_0e^{-0.0001t} \\ e^{-0.0001t}=\frac{0.65N_0}{N_0} \\ e^{-0.0001t}=0.65 \end{gathered}$

Taking Ln of both sides, we have

$\begin{gathered} ln(e^{-0.000t})=ln(0.65) \\ -0.0001t=ln(0.65) \\ t=\frac{ln(0.65)}{-0.0001} \\ t=4307.82916 \end{gathered}$

Hence the answer is 4308 to the nearest year

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1 year ago

Rebecca has 3 pairs of running shoes.She bought new shoelaces for each pair.How many shoelaces did she buy?

kvasek [131]

Answer: 6 shoelaces

Step-by-step explanation:

Since 1 pair of shoes has 2 shoelaces, 3 x 2 = 6

3 pairs x 2 shoelaces = 6 shoelaces

Hope this helped!

P.S. PLS give brailiest! I only have one brainliest!!

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3 years ago

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If the interest earned by a CD is compounded continuously, which rule is most accurate when calculating how long it will take th

malfutka [58]

For an investment compounded continuously, the rule of 69 gives a better approximation than the rule of 72 (for normal compound interests).

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3 years ago

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